Nut-lock



So Model.)

G. E. STRAUSS & E. KLAHN. NUT LOOK.

No. 578,276. Patented Mar. 2, 1897.

WITNESSES.-

ATTORNEY.

UNITED STATES PATENT 'OEETCE.

GUSTAVUS E. STRAUSS, OF NEW' YORK, N. Y., AND EMIL KLAHN, OF VEST HOBOKEN, NEW JERSEY.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 578,276, dated March 2, 1897.

Application filed June 2 7, 18 9 6.

To all whom it may concern.-

Be it known that we, GUSTAVUS E. STRAUSS, of New York, in the county of New York and State of New York, and EMIL KLAHN, of West Hoboken, in the county of Hudson andState of New J ersey', citizens of the United States, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

This invention relates to improvements in nut-locks, and has for'its purpose to provide a screw-nut which, when screwed upon a screw-bolt, cannot be loosened by the vibration of the machine or other object to which it is applied. This is attained by the construction shown in the accompanying drawings, in which- Figure 1 is a longitudinal section of our improved screw-nut and fastening attachment and of a screw-bolt to which the same is attached, and Fig. 2 is a section on line 2 2 of Fig. 1. Fig. 3 is a top view, and Fig. 4 a section, of the screw-nut. Fig. 5 represents a detail showing the fastening attachment.

Similar letters of reference indicate corresponding parts.

A in the drawings is a screw-nut, which on its top is provided with a tapering inwardlyexpanding circular excavation a, the side Wal of which is ribbed or serrated.

B is an annular or nearly annular ring, which has an inwardly-extending projection 19 and is split, so as to leave in its body an opening. The corners b b of the open ring are made sharp, which may be obtained by flattening the outer end portions of the same, as shown in Fig. 5. The ring is made of spring-acting metal, so that the ends of the same can be pressed together, and the outer periphery of the same may be. beveled, so as to correspond with the taper of the excavation a of the screw-nut.

D represents a screw-bolt gitudinal groove cl.

Our improved screw-nut is used in the following manner: After the screw nut is which has a lonscrewed upon the screw-bolt and has on the same obtained the required position the ends of the open ring B are pressed together, so that the circumference of the same is decreased, and the ring is then placed into the excavation a of the screw-nut and pushed Serial No. 597,242. (No model.)

down upon the bottom of the same. In doing so the projection b of the ring slides in the groove d of the screw-bolt. As soon as the ring has been placed into the excavation of the screw-nut, as said before, the ends of the ring, by the spring action of the same, will spread apart and the sharp corners of the ring will enter between the ribs or serrations of the excavation, so that thereby, and by the projection 19, located in the groove 01 of the bolt, a lateral as well as an upward motion of the ring is prevented. It is then entirelyimpossible for the screw-nut to get loose on the screw-bolt by vibration or any other cause, nor can it be detached from the same.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. A screw-nut having on its top an inwardly-tapering excavation provided with lateral ribs or serrations and an open springacting ring having its outer periphery beveled to correspond with the taper of the excavation and placed into the latter, the corners of the ring engaging the ribs or serrations of the excavation, substantially as set forth.

2. A screw-nut having on its top an excavation and a spring-acting open ring placed into the excavation and being provided with an inwardly-extending projection, in combination with a screw-bolt having a longitudinal groove, the said projection of the open rin extending into the said move of the screw-bolt, substantially as set forth.

3. A screw-nut having on its top an excavation provided with lateral ribs or serrations and an open spring-acting ring provided with an inwardly-extending projection the ends of the ring engaging the ribs or serrations of the said excavation, in combination with a screwbolt having a longitudinal groove in which the projection of the said ring is located, substantially as and for the purpose set forth.

Signed at New York, in the county and State of New York, this 26th day of June, A. D. 1896.

eUsTAvUs E. STRAUSS. EMIL KLAHN.

Witnesses:

HENRY HAMBURGER, A. PORGE. 

